Home / 20,105.47-27,745.35-11,152.74

Finding the Fourth Proportional to 20,105.47, 27,745.35 and 11,152.74

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Solution

The fourth proportional to 20,105.47, 27,745.35 and 11,152.74 is: 15,390.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.47 : 27,745.35 = 11,152.74 : x
  2. Step 2: Convert to fraction form
    20,105.47/27,745.35 = 11,152.74/x
  3. Step 3: Cross multiply
    20,105.47x = 27,745.35 × 11,152.74
  4. Step 4: Simplify right side
    20,105.47x = 309,436,674.76
  5. Step 5: Solve for x
    x = 309,436,674.76/20,105.47
  6. Step 6: Final answer
    x = 15,390.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.